As Microsoft, BlackBerry, Amazon and others try to build mobile ecosystems of their own, each are discovering that being as good as the competition is nowhere near enough to pick up market share.

What is enough? We asked our readers and some of the WSJ’s mobile-addicted staffers this question: What amazing feature would a new smartphone need to have to convince you to make the switch. Here are some of their answers. If you have one of your own, drop it in the comments and we will add it in.

First, from the WSJ crew:

Brian Fitzgerald, tech editor: Free data. A phone I can use however I want, whenever I want, and not worry about the bill. I’m not as worried about the upfront cost of a device as the ongoing costs, especially when it comes to data charges.

Rubina Madan Fillion, social media editor: Make it easy for me, and only me, to access all of my accounts securely. It would have privacy settings that would let me toggle whether or not my location and activity could be tracked. Passwords are easy to hack and difficult to remember, so I wouldn’t need to enter a password to access my most important accounts. But it would be difficult for anyone other than me to access them.

Wilson Rothman, personal tech editor: It would have to be something radical, like if I didn’t have to worry about bandwidth and storage anymore. Unlimited data and storage in the cloud, make my device really just a portal to everything, without having to think about it. Or give me a device that can somehow do everything: It can be a laptop when I need to work, a phone when I’m on move and a tablet when I’m relaxing.

Allison Lichter, social media editor: Build a phone around security and privacy. If I feel a new phone is going to put higher walls around my privacy and security, then I would switch.

Joanna Stern, personal tech columnist: Nothing. Nothing could make me switch if it didn’t come with all the apps I can get right now. Even if it’s some amazing phone, but I can’t get the apps, what would I do with it? You could give me a phone that lasts three weeks on a single battery, but would I be happy?

And now the readers:

@WSJD@WSJ mobility.. Of data, apps and setting in the same priority, across platforms. Desktop/Tablet/handheld.